Wet and dry bulb psychrometer for humidity measurement
1960-1970
1960-1970
1926-1932
1959
1950-1953
1940
1944
2010
1890
1960-1970
2010
1925
1925
2010
1997
mid-1800s
1876-1884
1815-1841
1643
1914
1924
1940-1950
1900-1908
1964
1939
1915
1899
1780-1800
1695-1705
1986
1930-1950
1975
1794
1986
1986
1891-1890
1771-1830
1850
1908
1871
[1965]
1985
1944